PCB Super Roughening Machine
Conveyorized chemical roughening machine that creates a micro-textured copper surface for inner-layer adhesion in multilayer PCB stacks. Sequential micro-corrosion, medium-roughening, and acid pickling stages controllably etch crystalline pits into the copper foil — those pits become the mechanical anchor points that prepreg resin flows into during lamination. Surface roughness Ra is held to 0.3–0.6 μm with a tight production tolerance.
Why This Equipment
- Two-stage roughening (micro-corrosion + medium-roughening) — pit nucleation and pit growth are decoupled, giving uniform pit density across the panel.
- Ra 0.3–0.6 μm controllable target — peel strength of inner-layer copper to prepreg jumps from < 0.5 N/mm to > 1.5 N/mm with proper roughening.
- Integrated acid pickle — removes the copper-salt residue from the roughening bath before rinse, so no salt nucleation sites are left.
- Four-stage post-pickle rinse + DI final — ion-free surface ready for prepreg lay-up.
- Tuned for prepreg lamination workflow — recipe matches the most common FR4 / high-Tg prepreg families.
Engineering Specifications
Where This Equipment Fits in the Production Line
Super roughening sits between PCB inner-layer etching and prepreg lamination. Without it, inner-layer copper does not bond reliably to the prepreg in multilayer stacks — delamination shows up as latent reliability failures in the field. Pairs with the OSP Machine for outer-layer copper finishing.
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Related Equipment in This Production Line
Related Recipes & Process Parameters
Every formula and parameter row below is a live page on this site with the full chemistry, conveyor speed, and tolerance window for the exact material-thickness-etchant combination. These are the references our process engineers cite from on production shifts.
Related Material References
Related Production Applications
Related Process Equipment
Frequently Asked Questions
Is this the same as the chemical cleaning machine?
No. Chemical cleaning removes contaminants from the surface; super roughening intentionally adds controlled texture to the surface. The chemistry is more aggressive (micro-etching the copper) and the bath sequence is different. Same panel might go through both — clean first, then roughen.
What roughness is required for typical FR4 lamination?
Ra 0.3–0.4 μm is the standard target for FR4 / 170 °C-Tg prepreg families. High-Tg or low-loss substrates (Megtron 6, Tachyon, etc.) require Ra 0.4–0.6 μm and a tighter uniformity spec — both inside this machine’s capability envelope.
What is the typical lead time from order to delivery?
Standard configurations: 8–12 weeks. Non-standard customizations: 12–16 weeks. Lead time includes mechanical build, electrical commissioning, bath chemistry validation on our pilot line, and packaged shipment.
What is the warranty?
Standard one-year warranty against manufacturing defects, plus lifetime maintenance support — spare parts are stocked and shipped from Shenzhen on order.
